Dynamically Update PDFS

I was anybody found a way to dynamically update criteria for PDF reports. For example I have sales reports but I need to duplicate these for each sales rep - Joe, John etc. Also would be nice to be able to update the period selection. I think I saw in a Tadabase Tuesday that the API now lets you interact with PDFs …Wonder if anybody has experimented with this …any ideas welcome on this subject tks Noel